Battery master switch spare key for our 445 switch. Dimensions - tongue 48mm x 20mm, shaft 11mm diameter x 22mm long with 4mm dia x 3mm long peg.

Used for side post terminal, battery negative post 3/8" hole only, DC 12 V system, rated current 125 A, On/Off 2 position. Heavy duty solid brass, corrosion resistant and durable. Used to isolate and secure the electrical system, eliminating any power draw from the battery when the vehicle is not in use, disconnects the battery safely.

Battery master switch/competition engine 'Kill' switch. FIA approved. Complete with ceramic resistor, spare key and instructions. Max load - 1000A @ 12v for 10 seconds 500A @ 24v for 10 seconds 100A continuous.

Simple yet effective battery master switch - fits on the battery post - no modifications needed - screw knob detaches if required.

Simple yet effective battery master switch - fits on the battery post - no modifications needed - screw knob detaches if required.

Battery master switch, good value alternative, black plastic body, red removable plastic key. Usually mounted in earth lead.

Sturdy panel mounted battery master isolator switch, similar to Lucas ST360 (SSB106) model. Requires 19mm hole in panel. A well-made reproduction part.At 12 volts rated for 100 Amps continuous.Fit to the NEGATIVE side of the battery (on a negative earth vehicle).

Battery master isolator switch for dashboard mounting etc equivalent to Lucas ST330, 76605. Mounting flange (53mm hole centres). The body is 43mm in diameter. The knob is marked with 'OFF' and arrow. The knob can be detached for installation by removal of the rear C circlip. Usually mounted into earth lead. The continuous load rating at 12v is 150ampsShort/Max load at 12v (example starting) is 500amps The third (low current) terminal is optional to allow the switch to function as an emergency engine cut-off by earthing a feed from the points or coil when the switch is in the OFF position - see wiring instructions. Fitting & Wiring Guide

Battery isolator rotary master switch, suitable for 6v, 12v, or 24-voltReproduction of Lucas SSB103. Also listed as part number 76604, 76605, 1B2804, ST330As used on many cars including Austin Healey, Aston Martin, Land Rover, MGA, Morris, etc. The continuous load rating at 12v is 150ampsShort/Max load at 12v (example starting) is 500amps Voltage 12v 24v Continuous Load 150 amps 75 amps Short Max Load 500 amps 250 amp Easy to isolate the battery from the vehicle chassis for safe maintenance and avoiding battery drain when the vehicle is not in use. Optional additional function for emergency engine cut-out (see wiring diagram) Fitting & Wiring Guide